Файловый ввод-вывод

#include <iostream>
#include <string>
 
struct telephone_subscribers{
  std::string  name,
               street;
  int          house_num,
               flat_num,
               tel_number;
 
  friend std::istream &operator>> (std::istream &is, telephone_subscribers &one);
  friend std::ostream &operator<< (std::ostream &is, const telephone_subscribers &one);
 
};
 
std::istream &operator>> (std::istream &is, telephone_subscribers &one){
  std::cout << "Name = ";
  is >> one.name;
  std::cout << "Street = ";
  is >> one.street;
  std::cout << "House number = ";
  is >> one.house_num;
  std::cout << "Flat number = ";
  is >> one.flat_num;
  std::cout << "Telephone number = ";
  is >> one.tel_number;
  return is;
}
 
std::ostream &operator<< (std::ostream &os, const telephone_subscribers &one){
  os << "Name: " << one.name << '\n' << "Street: " << one.street << '\n'
     << "House number: " << one.house_num << '\n' << "Flat number: " << one.flat_num << '\n'
     << "Telephone number: " << one.tel_number << std::endl;
  return os;
}
 
int main(){
  telephone_subscribers obj;
  std::cin >> obj;
  std::cout << "\n\n" << obj;
  getchar(); getchar();
  return 0;
}